Strange letter

Today, my mother got this letter saying Österreichische Post AG on the front. And what was inside? One of those letters saying "you've won bla bla bla". I wonder whether they could get problems because

• they promise a win that obviously doesn't exist in the way it was described in the letter (a quick research on Google showed that, and IIRC there was a verdict that said that promised wins must be given to the "winner", but I can't find the website anymore :-/)
• they make the letter look like it came from Österreichische Post AG even while it comes from "Titan Marketing".

I will try to get some more information about this, and will keep you informed if I have any news about that.